In the mean-time, it is just about possible to get a list of your rejected edits (more easily than clicking through Every. Single. Edit. on one's profile to check, that is) using StackExchange data explorer and a query something like this:
SELECT
*
FROM SuggestedEdits WHERE RejectionDate is not null AND OwnerUserId = MY_ID
(where MY_ID
is your SO user ID).
An example showing my rejected editmy rejected edit.